Once a satellite has been launched into orbit, the only force governing its motion is the force of -
1) Gravity
2) Elasticity
3) Friction
4) Fuel driven

Why does the force of gravity do no work on (a) a bowling ball rolling along a bowling alley and (b) a satellite on circular orbit about the Earth?

A satellite follows the elliptical orbit show. The only force onthe satellite is the gravitational attraction of the planet. Thesatellite's speed at point a is 8000 m/s.

a. IS there any torque on the satellite? Explain.

b. What is the satellite's speed at point b?

c. What is the satellite's speed at point c?

A satellite follows the elliptical orbit shown. The only force onthe satellite is the gravitational attraction of the planet. Thesatellite’s speed at point a is 8000 m/s.

(a) Is there any torque on the satellite? Explain your answer

(b) What is the satellite’s speed at point b?